GPS-7A Energy Meter Clock Calibration Tester

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GPS-7A Energy Meter Clock Calibration Tester

Product ID：CLQTsjpljly040

Price: Please inquire PDF Format

Supply Ability:50 SETS/MON

Port:SHENZHEN

Product Introduction
Other information

Model NumberGPS-7A

Brand NameGZZHIHUIYUAN

Payment TermsTT，PAYPAL，Alibaba.com Pay

GPS-7A Energy Meter Clock Calibration Tester
Product Overview
The GPS-7A Energy Meter Clock Calibration Tester is a high-precision portable instrument that integrates satellite timing technology with energy meter clock error measurement. It is specifically designed for power utilities, metrology laboratories, and energy meter manufacturers to test energy meter clock deviation and time synchronization errors.
The instrument adopts a GPS/BeiDou dual-mode satellite positioning and timing system to establish a high-precision time reference synchronized with UTC, with synchronization accuracy better than 30 ns. It supports multiple timing and test signal interfaces to meet different energy meter testing and time synchronization requirements.
The GPS-7A can perform energy meter daily deviation testing through a 1 Hz optocoupler signal, providing a test accuracy better than ±0.01 s/d, a test range of ±10 s/d, and a resolution of 0.001 s/d.
Its compact and portable design makes it suitable for laboratory verification, production testing, metrological inspection, field maintenance, and energy meter R&D.

Key Features
• GPS/BeiDou dual-mode satellite timing system for high-precision time reference
• UTC synchronization accuracy better than 30 ns
• Designed for energy meter clock error and time synchronization testing
• Supports energy meter 1 Hz optocoupler signal input
• Daily deviation test accuracy better than ±0.01 s/d
• Daily deviation test range up to ±10 s/d
• Test resolution of 0.001 s/d
• Two test channels for efficient energy meter testing
• Supports PPS, 1 MHz, and 1 kHz precision timing signal outputs
• Built-in high-stability 10 MHz crystal oscillator
• Compact and portable design for laboratory and field applications
• Short 5-minute warm-up time

Working Principle
The GPS-7A receives precise timing information from GPS and BeiDou satellite navigation systems and establishes a high-accuracy reference time synchronized with UTC.
During energy meter clock testing, the instrument receives the 1 Hz optocoupler output signal from the energy meter. The timing of the measured signal is compared with the internal high-precision reference time to determine the difference between the energy meter clock and the standard time.
Based on the measured time difference, the instrument calculates the daily clock deviation of the energy meter. This enables users to evaluate the clock accuracy and determine whether the energy meter meets the required technical specifications.
The instrument can also provide PPS, 1 MHz, and 1 kHz precision timing signals for time synchronization, calibration, and related measurement applications.

Technical Specifications

Parameter	Specification
Daily Deviation Test Input Signal	1 Hz optocoupler signal from energy meter
Daily Deviation Accuracy	Better than ±0.01 s/d
Daily Deviation Test Range	±10 s/d
Test Resolution	0.001 s/d
Test Method	Contact type
Number of Test Channels	2 channels
Time Reference	Beijing Time
Time Difference Accuracy	±1 s after synchronization
PPS Output	PPS
PPS Time Difference	Better than 1 × 10⁻⁶ s after synchronization
1 MHz Output Accuracy	Better than 2 × 10⁻⁷ after synchronization
1 kHz Output Accuracy	Better than 2 × 10⁻⁷ after synchronization
Crystal Oscillator Frequency	10 MHz
Crystal Oscillator Startup Characteristic	Better than 5 × 10⁻⁸
Relative Frequency Deviation	≤2 × 10⁻⁷
Warm-up Time	5 minutes
Operating Temperature	-20°C to +50°C
Relative Humidity	≤90% RH at 40°C
Storage Temperature	-30°C to +70°C
Power Supply	AC 220 V ±10%, 50 Hz ±5%
Power Consumption	<30 W
Dimensions	152 × 108 × 49 mm
Standard Accessories	GPS & BeiDou antenna, power cable, test cables, user manual

Applications
Power System Operation and Maintenance
The GPS-7A is used to verify the clock accuracy of smart energy meters during field inspection and maintenance. Accurate clock verification helps identify time synchronization problems that may affect time-based energy measurement and billing.
Energy Meter Manufacturing and R&D
Energy meter manufacturers can use the tester during product development, production inspection, quality control, and final testing to evaluate the clock running error and timekeeping performance of energy meters.
Metrology Laboratories
Metrology organizations can use the GPS-7A to measure energy meter clock deviation and determine whether the tested meter meets applicable accuracy requirements.
Energy Meter Calibration and Verification
The instrument provides a high-precision time reference for energy meter clock verification, synchronization error testing, and related calibration tasks.

Application Scenarios
• Smart energy meter clock accuracy verification
• Energy meter production line testing
• Energy meter R&D and performance evaluation
• Power utility field inspection
• Electricity meter metrology and calibration laboratories
• Energy meter time synchronization error testing
• Energy meter quality control and acceptance testing
• Energy meter clock deviation measurement

Comparison

Feature	GPS-7A Energy Meter Clock Calibration Tester	Conventional Energy Meter Clock Tester
Time Reference	GPS/BeiDou satellite timing	Conventional reference clock
UTC Synchronization	Better than 30 ns	Depends on reference system
Daily Deviation Measurement	Yes	Yes
Daily Deviation Accuracy	Better than ±0.01 s/d	Depends on equipment
Test Resolution	0.001 s/d	Depends on equipment
Test Channels	2 channels	Typically limited
1 Hz Optocoupler Input	Supported	Depends on model
PPS Output	Supported	Depends on model
1 MHz Output	Supported	Depends on model
1 kHz Output	Supported	Depends on model
10 MHz Crystal Oscillator	Built in	Depends on model
Field Testing	Suitable	Depends on equipment
Portability	Compact design	Varies

The GPS-7A provides a more integrated solution by combining GPS/BeiDou satellite time synchronization, energy meter clock deviation measurement, multiple precision timing outputs, and two-channel testing in one portable instrument.

FAQ
What is the GPS-7A Energy Meter Clock Calibration Tester used for?
The GPS-7A is primarily used to measure the clock error and daily time deviation of energy meters. It can also perform time synchronization error testing and provide precision timing signals.
What signal does the energy meter provide to the GPS-7A?
The tester accepts a 1 Hz optocoupler signal from the energy meter for daily clock deviation measurement.
What is the daily deviation measurement accuracy?
The daily deviation measurement accuracy is better than ±0.01 s/d, with a resolution of 0.001 s/d and a test range of ±10 s/d.
How many test channels does the GPS-7A provide?
The GPS-7A provides 2 test channels, allowing two measurement inputs to be handled efficiently.
Does the GPS-7A support GPS and BeiDou?
Yes. The instrument uses a GPS/BeiDou dual-mode satellite positioning and timing system to establish a high-precision reference time.
What is the UTC synchronization accuracy?
The time reference synchronization accuracy is better than 30 ns.
Can the GPS-7A be used for field testing?
Yes. With dimensions of only 152 × 108 × 49 mm, the GPS-7A is designed for portable laboratory and field testing applications.
How long does the instrument need to warm up?
The specified warm-up time is 5 minutes.
Who can use the GPS-7A?
The instrument is suitable for power utilities, energy meter manufacturers, metrology laboratories, calibration organizations, and energy meter R&D departments.

FAQ
What is the GPS-7A Energy Meter Clock Calibration Tester used for?
The GPS-7A is primarily used to measure the clock error and daily time deviation of energy meters. It can also perform time synchronization error testing and provide precision timing signals.
What signal does the energy meter provide to the GPS-7A?
The tester accepts a 1 Hz optocoupler signal from the energy meter for daily clock deviation measurement.
What is the daily deviation measurement accuracy?
The daily deviation measurement accuracy is better than ±0.01 s/d, with a resolution of 0.001 s/d and a test range of ±10 s/d.
How many test channels does the GPS-7A provide?
The GPS-7A provides 2 test channels, allowing two measurement inputs to be handled efficiently.
Does the GPS-7A support GPS and BeiDou?
Yes. The instrument uses a GPS/BeiDou dual-mode satellite positioning and timing system to establish a high-precision reference time.
What is the UTC synchronization accuracy?
The time reference synchronization accuracy is better than 30 ns.
Can the GPS-7A be used for field testing?
Yes. With dimensions of only 152 × 108 × 49 mm, the GPS-7A is designed for portable laboratory and field testing applications.
How long does the instrument need to warm up?
The specified warm-up time is 5 minutes.
Who can use the GPS-7A?
The instrument is suitable for power utilities, energy meter manufacturers, metrology laboratories, calibration organizations, and energy meter R&D departments.